Responses of the D region ionosphere to solar flares revealed by MF radar measurements

被引：10

作者：

Li, Na ^{[1
,2
]}

Lei, Jiuhou ^{[1
]}

Luan, Xiaoli ^{[1
]}

Chen, Jinsong ^{[2
]}

Zhong, Jiahao ^{[1
]}

Wu, Qian ^{[3
]}

Xu, Zhengwen ^{[2
]}

Lin, Leke ^{[2
]}

机构：

[1] Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Geospace Environm, Hefei, Anhui, Peoples R China

[2] China Res Inst Radiowave Propagat, Natl Key Lab Electromagnet Environm, Qingdao, Shandong, Peoples R China

[3] Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA

来源：

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 2019年 / 182卷

基金：

中国国家自然科学基金;

关键词：

Electron density; MF radar; Solar flare; Reflection height; X-RAY; ELECTRON-DENSITIES; VLF PHASE; ENHANCEMENTS; PROFILE; MIDDLE; WAVE;

D O I：

10.1016/j.jastp.2018.11.014

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Electron density (N-e) and effective reflection height (H', where the electron density reaches its peak value) in the D region observed by medium frequency (ME) radar at Kunming (25.6 degrees N, 103.8 degrees E) were utilized to quantitatively study the ionospheric response to solar flares. It was found that the H' and N-e had profound responses to solar flares. The results showed a sharp decrease in the H' from 76 to 80 km during the non-flare period to nearly 58 km with flares, and a sudden increase in the N-e from below 4x 10(8) m(3) in non-flare period to 1.8x 10(9) m(3) during 13 M-level flares. The behavior of N-e was strongly and positively correlated with the variation of the X-ray flux, with the largest coefficient being 0.93, while the changes of H' exhibited a strongly negative correlation of -0.96 with that of the X-ray flux. Moreover, variations of H' and Delta N-e depended on not only the flare level, but also upon the onset time and duration of flare.

引用

页码：211 / 216

页数：6

共 22 条

[21] Determination of Enhancement in D-region Electron Density using Solar Flare Model and GOES-7 Measurements
Abdullah, Mardina
Zain, Ahmad Faizal Mohd
JURNAL KEJURUTERAAN, 2005, 17 : 13 - 26
[22] Earth's ionosphere D-region vertical electron density profile data during March 1-31, 2017 according to high-latitudinal Tumanny observatory partial reflection radar measurements and Polar Geophysical Institute's model
Gomonov, Aleksandr
Yurk, Roman
Zolotov, Oleg
DATA IN BRIEF, 2020, 31

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